Display screen of a diagnostic device with graphical user interface



FIG. 1 is a front view of a display screen with graphical user interface showing our new design; and,

FIG. 2 is a second embodiment thereof.

The broken lines showing a display screen illustrate portions of the article, and form no part of the claimed design. 

CLAIM The ornamental design for a display screen of a diagnostic device with graphical user interface, as shown and described. 